Choose the correctly spelt word.
1). Apthy
2). Designition
3). Arduous
4). Dissinterest
The word 'arduous' is correct and it means 'difficult.'
The other words are:
Apathy=> state of total disinterest or unenthusiasm$
Designation=> an official name, description, or title$
Disinterest=> the state of not being influenced by personal involvement in something; impartiality$
Thus option 3 is the correct answer.$